Floor structure.



. FRANCIS FLOOR STRUCTURE APPLICATION FILED NOV.

Patented Oct. 26, 1915.

2 SHEETS-SHEET l.

cnLUMmA PLANDGRM'H co.. WASmNG'mN, nA c.

Patented Oct. 26, 1915 2 SHEETS-SHEET 2.

Lllg.

WIT/VESSES COLUMBIA PLANOGRM'H cn..w/\SH|NGTON. D. c.

FLOOR STRUCTURE.

Application filed November 3, 1914.

To all whom t may concern Be it known that I, WILLIAM PINGKNEY FRANCIS,a citizen of the United States, and a resident of Atlanta, in the countyof Fulton and State of Georgia, have invented a new and Improved FloorStructure, of which the following is a. full, clear, and exactdescription.

rIhis invention relates to floor construction in which cellular tiles,metal reinforcing bars and concrete form the constituent elements, andthe invention has to deal more particu* larly with a slab constructionembodying a plurality of tiles, which slabs are laid side by side andsupported on beams or girders, and over the slab is poured asurface-forming concrete.

'Ihe general objects of the present invention are to provide an improvedform of slab made of cellular blocks or sections which are bonded byconcrete in a novel and effective manner, whereby a slab of greatstrength and durability is obtained.

A further object of the invention is the provision of a novel form ofcellular tile especially designed to be severed longitudinally so thatthese severed sections can be laid in two lines a suitable distanceapart and bonded by concrete, the surfaces in the plane of severancebeing so shaped that the bonding concrete will be dovetailed into thesevered sections of the tile.

With such objects in View and others which will appear as thedescription pro ceeds, the invention comprises various novel features ofconstruction and arrangement of parts which will be set forth withparticularity in the following description and claims appended hereto.

In the accompanying drawings which illustrate one embodiment of theinvention and wherein similar characters of reference indicatecorresponding parts in all the views, Figure l is a perspective view ofone of the cellular tiles as manufactured; Fig. 2 is a transversesection of a slab showing two sections of a tile united by a bond ofconcrete, the slab being in place on a form that is used in the makingof the slab; Fig. 3 is a transverse section through two slabs arrangedside by side as in the laying of a floor; Fig. 4 is a similar view withthe concrete ooring layer applied to the slabs;

Specification of Letters Patent.

Patented Uct. 26, 1915.

serial No. 870,015.

Referring to the drawing, in Fig. 1 is shown a terra cotta or othercellular tile which comprises a bottoni plate Vl, a top plate 2, outervertical walls 3 and inner vertical walls 4, said plates and walls beingso related as to form longitudinal passages or cells 5. The walls 4 arespaced apart to form a central passage 6 and the tile is scored at thetop and bottom along the lines 7 and 8 so that the tile can be severedby a trowel or other instrument into two sections a and vseparable on aplane passing centrally between the inner walls 4. This leaves intheouter surface of each wall 4 a recess 9 which is of dovetailedcross-section for the purpose of enabling the two sections to be bondedtogether effectively by cement which is placed between the sectionswhile the latter are suitably spaced apart. 'Ihe plate 1 projects fromthe sides of the tile to forni anges 10 for the purpose to behereinafter described.

In making a slab from tiles of the construction described a form A, Fig.2, is employed, this form being as long as the slab desired and of awidth corresponding to the width of the slab. The sides of the form areprovided with upstanding flanges l1 and lla, so that the slab will be ofuniform width throughout its length, and all the slabs will be of thesame width. In making the slab the cellular tiles are divided into twosections a and ZJ, and these sections are placed on, the forni with allthe sections a in end to end contact and the sections b also in end toend contact, and all the sections ct are in engagement with the flange1l of the form, while the sections b are engaged with the flange 11a.This leaves a space between the oppositely disposed sections a and b thefull length of the slab, and this space is filled with a bondingmaterial, such as concrete 12, Fig. 2, but before this material isfilled in a metallic reinforcing bar or fiat strip 13 is disposedlongitudinally of the space between the two series of tile sections a.and the plane of the strip being vertical or parallel with the walls 4,and this strip is long enough that its ends will project out of the endsof the slab. After the concrete l2 has hardened, the slab is removedfrom the form A.

In laying a floor, roof or other structure the slabs made as describedare placed side by side in longitudinal parallel relation, as v shown inFig. 3, The flanges 10 of the cell.

formed between adjacent slabs.

form flanges extending the full length of the slab, and these flangesare placed in contact so that a longitudinal channel 14 is In thischannel is a longitudinal reinforcing means in the form of an iron bar15, and after this i's placed a surface layer of concrete 16 is pouredover the slabs and smoothed, this concrete filling the channels la;

It is to be understood that the slabs have end supports such as thebeams, girders or piers B, Figs. 5 and 6. It will be noted that theseries of slabsC are in line with the series and C2, and the projectingextremities 13a of the reinforcing bars 13 of the alinv ing slabs of theseveral series are arranged in overlapping relation, and for thispurpose they are slightly bent, as clearly shown in Fig. 5. Theseoverlapping extremities of the reinforcing bars overlie the beams B andeach reinforcing bar 15 between adjacent slabs overlaps at its ends 15,uthe extremities Yof alining reinforcing bars, and

` f this overlapping occurs directly over the beams. IVhen the surfacelayer of concrete 16 'is placed over the slabs it not only covers thelatter but fills in the space between the ends of alining slabs at thebeams or girders B, and consequently the overlapping extremities of thetwov sets of reinforcing bars will be embedded in concrete.

From the foregoing description taken in connection with the accompanyingdrawing,

the advantages of *the construction and 35 method of operation will bereadily understood by those skilled in the art to which the inventionappertains, and while I have described the principle of operation,together with the structure which I now consider to be the bestembodiment thereof, I desire to have it understood that the structureshown is merely illustrative and that such changes may be made whendesired as are within the scope of the appended claims.

Having thus described my invention, I claim as'new and desire to secureby Letters Patent:

1. A tile structure made of two symmetrical halves, each formed of fourwalls providing a chamber open at the ends, the inner walls of the twohalves being scparated by a narrow chamber of double dovetailedcross-section, there being grooves forming lines of cleavage disposedcentrally of the said last-mentioned chamber, whereby the tile can beseparated into two similar parts, each half of the tile having anoutwardly-extending flange flush with the bottom face.-

2. As a new article of manufacture, a slab composed of spaced lines ofhollow bodies, and concrete between the lines for bonding the lines ofbodies together and for holding the bodies of each line together, saidbodies composing halves of tiles each formed of four walls providing achamber open at the ends, the inner walls of the two halves beingseparated by a narrow chamber of double dove-tailed crosssection, therebeing grooves forming lines of cleavage disposed centrally of the saidlastmentioned chamber, whereby the tile can be separated into twosimilar parts, each half of the tile having an outwardly-extendingflange iiush with the bottom face.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM PINUKNEY FRANCIS. lVitnesses FAIR Donn, F. T. RILEY;

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

